john king is there. >> reporter: the bullets are real. complacency the enemy at the security training kacademy. >> we have enemies motivated on us to do attacks in the cities, settlements, wherever there are jews. we're not waiting for the suicide bomber to come. we want to be prepared. >> reporter: expect the unexpected is what gat, a colonel in the israeli reserves, teaches students like these men training to protect jerusalem's light rail service. yet, he has zero expectations president obama's visit will make any difference at this time of increasingle israeli-palestinian tension. >> i remember my mother said when i was a child, i hope you don't are to go through the army. i told her always, since i was a child, i don't think that will be true. and me, i'm not telling that to my kids. i'm telling them, listen, guys, these are the facts, if you live in israel, you'll probably have to go to the army. >> reporter: low expectations done mean there aren't enormous stakes. >> he does not want to be the american president on whose watch iran